| File name: | msimg32.dll |
| Full analysis: | https://app.any.run/tasks/e1eb1389-5d2c-460e-b14e-e9b599f97781 |
| Verdict: | Malicious activity |
| Threats: | Remote access trojans (RATs) are a type of malware that enables attackers to establish complete to partial control over infected computers. Such malicious programs often have a modular design, offering a wide range of functionalities for conducting illicit activities on compromised systems. Some of the most common features of RATs include access to the users’ data, webcam, and keystrokes. This malware is often distributed through phishing emails and links. |
| Analysis date: | August 22, 2024, 12:55:49 |
| OS: | Windows 10 Professional (build: 19045, 64 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/x-dosexec |
| File info: | PE32 executable (DLL) (console) Intel 80386, for MS Windows |
| MD5: | 4D96CF87EF74BF16762E1A69B7AE33BD |
| SHA1: | CC0F5EDA7F41B693B0C59B9FA9BFBD91F74810AA |
| SHA256: | 3B56D9DE79B21AAE56CB74C20B19030F149FC75F044434B07B7CE3247D86C946 |
| SSDEEP: | 98304:pjvjS0P0n/rhIXBnpAclcMpvLhtkExn602NGokrpmLF:SyxK |
MALICIOUS
Connects to the CnC server
- rundll32.exe (PID: 5244)
REMCOS has been detected
- rundll32.exe (PID: 5244)
- rundll32.exe (PID: 5244)
REMCOS has been detected (SURICATA)
- rundll32.exe (PID: 5244)
REMCOS has been detected (YARA)
- rundll32.exe (PID: 5244)
Changes the autorun value in the registry
- reg.exe (PID: 6628)
SUSPICIOUS
Application launched itself
- rundll32.exe (PID: 6696)
Drops the executable file immediately after the start
- rundll32.exe (PID: 6696)
Contacting a server suspected of hosting an CnC
- rundll32.exe (PID: 5244)
Uses REG/REGEDIT.EXE to modify registry
- cmd.exe (PID: 1688)
Starts CMD.EXE for commands execution
- rundll32.exe (PID: 6696)
Connects to unusual port
- rundll32.exe (PID: 5244)
There is functionality for taking screenshot (YARA)
- rundll32.exe (PID: 5244)
Checks for external IP
- rundll32.exe (PID: 5244)
INFO
Reads security settings of Internet Explorer
- rundll32.exe (PID: 5244)
Creates files or folders in the user directory
- rundll32.exe (PID: 5244)
Checks proxy server information
- rundll32.exe (PID: 5244)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
Remcos
(PID) Process(5244) rundll32.exe
C2 (1)78.142.18.62:2404
BotnetRemoteHost
Options
Connect_interval1
Install_flagFalse
Install_HKCU\RunTrue
Install_HKLM\RunTrue
Install_HKLM\Explorer\Run1
Install_HKLM\Winlogon\Shell100000
Setup_path%LOCALAPPDATA%
Copy_fileremcos.exe
Startup_valueFalse
Hide_fileFalse
Mutex_nameRmc-2M61V7
Keylog_flag0
Keylog_path%LOCALAPPDATA%
Keylog_filelogs.dat
Keylog_cryptFalse
Hide_keylogFalse
Screenshot_flagFalse
Screenshot_time5
Take_ScreenshotFalse
Screenshot_path%APPDATA%
Screenshot_fileScreenshots
Screenshot_cryptFalse
Mouse_optionFalse
Delete_fileFalse
Audio_record_time5
Audio_path%ProgramFiles%
Audio_dirMicRecords
Connect_delay0
Copy_dirRemcos
Keylog_dirremcos
TRiD
| .exe | | | Win32 Executable (generic) (52.9) |
|---|---|---|
| .exe | | | Generic Win/DOS Executable (23.5) |
| .exe | | | DOS Executable Generic (23.5) |
EXIF
EXE
| MachineType: | Intel 386 or later, and compatibles |
|---|---|
| TimeStamp: | 2023:12:12 04:29:14+00:00 |
| ImageFileCharacteristics: | Executable, 32-bit, DLL |
| PEType: | PE32 |
| LinkerVersion: | 14.16 |
| CodeSize: | 1084928 |
| InitializedDataSize: | 1937408 |
| UninitializedDataSize: | - |
| EntryPoint: | 0x29e16 |
| OSVersion: | 6 |
| ImageVersion: | - |
| SubsystemVersion: | 6 |
| Subsystem: | Windows command line |
| FileVersionNumber: | 1.0.0.1736 |
| ProductVersionNumber: | 1.0.0.1736 |
| FileFlagsMask: | 0x0017 |
| FileFlags: | (none) |
| FileOS: | Win32 |
| ObjectFileType: | Dynamic link library |
| FileSubtype: | - |
| LanguageCode: | English (U.S.) |
| CharacterSet: | Unicode |
| CompanyName: | NEXT Biometrics |
| FileDescription: | NEXT Biometrics Uidai 1.0.0.1736 |
| FileVersion: | 1, 0, 0, 1736 |
| InternalName: | NBUidai |
| LegalCopyright: | Copyright (C) 2017-2018 NEXT Biometrics |
| OriginalFileName: | NBUidai.dll |
| ProductName: | NEXT Biometrics Uidai |
| ProductVersion: | 1, 0, 0, 1736 |
Total processes
134
Monitored processes
5
Malicious processes
2
Suspicious processes
1
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1688 | cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*ChromeUpdate" /t REG_SZ /d "rundll32.exe C:\Users\admin\Documents\FirefoxData.dll",EntryPoint /f & exit | C:\Windows\SysWOW64\cmd.exe | — | rundll32.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows Command Processor Exit code: 0 Version: 10.0.19041.3636 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 5244 | "C:\WINDOWS\SysWOW64\rundll32.exe" | C:\Windows\SysWOW64\rundll32.exe | rundll32.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows host process (Rundll32) Version: 10.0.19041.3636 (WinBuild.160101.0800) Modules
Remcos(PID) Process(5244) rundll32.exe C2 (1)78.142.18.62:2404 BotnetRemoteHost Options Connect_interval1 Install_flagFalse Install_HKCU\RunTrue Install_HKLM\RunTrue Install_HKLM\Explorer\Run1 Install_HKLM\Winlogon\Shell100000 Setup_path%LOCALAPPDATA% Copy_fileremcos.exe Startup_valueFalse Hide_fileFalse Mutex_nameRmc-2M61V7 Keylog_flag0 Keylog_path%LOCALAPPDATA% Keylog_filelogs.dat Keylog_cryptFalse Hide_keylogFalse Screenshot_flagFalse Screenshot_time5 Take_ScreenshotFalse Screenshot_path%APPDATA% Screenshot_fileScreenshots Screenshot_cryptFalse Mouse_optionFalse Delete_fileFalse Audio_record_time5 Audio_path%ProgramFiles% Audio_dirMicRecords Connect_delay0 Copy_dirRemcos Keylog_dirremcos | |||||||||||||||
| 6544 | \??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1 | C:\Windows\System32\conhost.exe | — | cmd.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Console Window Host Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 6628 | reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*ChromeUpdate" /t REG_SZ /d "rundll32.exe C:\Users\admin\Documents\FirefoxData.dll",EntryPoint /f | C:\Windows\SysWOW64\reg.exe | cmd.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Registry Console Tool Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 6696 | "C:\WINDOWS\SysWOW64\rundll32.exe" C:\Users\admin\AppData\Local\Temp\msimg32.dll, #1 | C:\Windows\SysWOW64\rundll32.exe | — | explorer.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows host process (Rundll32) Exit code: 0 Version: 10.0.19041.3636 (WinBuild.160101.0800) Modules
| |||||||||||||||
Total events
980
Read events
965
Write events
15
Delete events
0
Modification events
| (PID) Process: | (5244) rundll32.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Rmc-2M61V7 |
| Operation: | write | Name: | exepath |
Value: 373598EC36D9A4BEF77A3086E4C61CB8B616BA463A23358588DBFAF5A768F09B19D7FD9812CE857C43BEB3137ACA32AE600DA30ABFAD845A03D161A0BCFCD71450D7 | |||
| (PID) Process: | (5244) rundll32.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Rmc-2M61V7 |
| Operation: | write | Name: | licence |
Value: FC438BD592D3F95369CE9E1C76418096 | |||
| (PID) Process: | (5244) rundll32.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Rmc-2M61V7 |
| Operation: | write | Name: | time |
Value: | |||
| (PID) Process: | (5244) rundll32.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | ProxyBypass |
Value: 1 | |||
| (PID) Process: | (5244) rundll32.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | IntranetName |
Value: 1 | |||
| (PID) Process: | (5244) rundll32.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | UNCAsIntranet |
Value: 1 | |||
| (PID) Process: | (5244) rundll32.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | AutoDetect |
Value: 0 | |||
| (PID) Process: | (5244) rundll32.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content |
| Operation: | write | Name: | CachePrefix |
Value: | |||
| (PID) Process: | (5244) rundll32.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies |
| Operation: | write | Name: | CachePrefix |
Value: Cookie: | |||
| (PID) Process: | (5244) rundll32.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History |
| Operation: | write | Name: | CachePrefix |
Value: Visited: | |||
Executable files
0
Suspicious files
1
Text files
0
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 6696 | rundll32.exe | C:\Users\admin\Documents\FirefoxData.dll | — | |
MD5:— | SHA256:— | |||
| 5244 | rundll32.exe | C:\Users\admin\AppData\Local\Microsoft\Windows\INetCache\IE\RR3E01RZ\json[1].json | binary | |
MD5:5C5315393A4F8A1B3E4B921070B1D46D | SHA256:D0A8A0EFBF97E7FD5C5CC22E97227A3D7593BB681EF8CC9081CB91542F75E131 | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
4
TCP/UDP connections
30
DNS requests
17
Threats
3
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
2204 | svchost.exe | GET | 200 | 192.229.221.95:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D | unknown | — | — | whitelisted |
6880 | backgroundTaskHost.exe | GET | 200 | 192.229.221.95:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEAn5bsKVVV8kdJ6vHl3O1J0%3D | unknown | — | — | whitelisted |
5244 | rundll32.exe | GET | 200 | 178.237.33.50:80 | http://geoplugin.net/json.gp | unknown | — | — | whitelisted |
1168 | SIHClient.exe | GET | 200 | 184.30.21.171:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl | unknown | — | — | whitelisted |
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
Connections
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
2992 | svchost.exe | 40.127.240.158:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | unknown |
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
4876 | RUXIMICS.exe | 40.127.240.158:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | unknown |
2120 | MoUsoCoreWorker.exe | 40.127.240.158:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | unknown |
2992 | svchost.exe | 4.231.128.59:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
3260 | svchost.exe | 40.113.103.199:443 | client.wns.windows.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
2204 | svchost.exe | 40.126.32.133:443 | login.live.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | unknown |
2204 | svchost.exe | 192.229.221.95:80 | ocsp.digicert.com | EDGECAST | US | whitelisted |
6880 | backgroundTaskHost.exe | 20.223.35.26:443 | arc.msn.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | unknown |
6880 | backgroundTaskHost.exe | 192.229.221.95:80 | ocsp.digicert.com | EDGECAST | US | whitelisted |
DNS requests
Domain | IP | Reputation |
|---|---|---|
settings-win.data.microsoft.com |
| whitelisted |
google.com |
| whitelisted |
client.wns.windows.com |
| whitelisted |
login.live.com |
| whitelisted |
ocsp.digicert.com |
| whitelisted |
arc.msn.com |
| whitelisted |
geoplugin.net |
| malicious |
slscr.update.microsoft.com |
| whitelisted |
www.microsoft.com |
| whitelisted |
fe3cr.delivery.mp.microsoft.com |
| whitelisted |
Threats
PID | Process | Class | Message |
|---|---|---|---|
5244 | rundll32.exe | Malware Command and Control Activity Detected | ET MALWARE Remcos 3.x Unencrypted Checkin |
5244 | rundll32.exe | Malware Command and Control Activity Detected | ET MALWARE Remcos 3.x Unencrypted Server Response |
1 ETPRO signatures available at the full report